I created a trivially simple empty project and chose "File | Export Template". All this works and I can now add a project of that type if I restart VS. What I want to be able to do is customise the tree node that my custom project templates appear under in the New Project dialog. For instance, at the moment they appear directly under 'Visual C#'. I would like to find them under 'My Company Name'\'My Project Name' etc.
I have tried altering the and elements of the .vstemplate file but none of this works and usually results in the template not be loaded. Am I stuck with the limited options that VS provides out-of-the-box?